i.MX Processors中的主题 Re: imx6ull serial download

imx6ull serial download

victorrr — Mon, 01 Jul 2024 11:07:36 GMT

We have an issue when we try to program a custom board based on the EVK imx6ull board. In fact, the core is the same as EVK where we changed SD card with emmc memory. We did this change in EVK without any problem.

Then problem is we cannot find out the reason why we cannot download software. We are using Mfgtools L.6.6.3(uuu).

We checked voltages as described in Table 23 - Sample voltage report from IMX6ULLHDG.

We checked clocks and frequencies.

We checked reset which is delay with MAX803 a minimum of 140ms after 3v3 NCVCC is up and additional RC(1k/100nF).

We can detect the imx6ull from the pc as “SE Blank 6ULL” .

Bootstraps are the same as EVK but they are set at 2v8(other parts are at 3v3, for example emmc).

When we try to download, we get a USB timeout error, but we cannot get any information about it and any message on UART1.

Is there any thing more to be check or any way to try to get more information?

Thank you,

Re: imx6ull serial download

JorgeCas — Mon, 01 Jul 2024 14:06:07 GMT

Hello,

Are you following the same process to flash using UUU in i.MX6ULL EVK and your custom board? Does it work in EVK board?

Which UUU version are you using?

What is the different between EVK board and your design?

Best regards.

Re: imx6ull serial download

V_Palacio — Mon, 01 Jul 2024 15:38:28 GMT

Hi, I'm working with the other Victor with this problem...
We have tried with L6.1.22 and L6.6.3 mfgtools from NXP website. Both ship the same uuu:
"uuu (Universal Update Utility) for nxp imx chips -- libuuu_1.5.181-0-gd362f4a"
Regards,

Re: imx6ull serial download

V_Palacio — Mon, 01 Jul 2024 15:47:17 GMT

...and yes, we have downloaded and booted an mx6ull-evk board with this mfgtool

Regards

Re: imx6ull serial download

JorgeCas — Mon, 01 Jul 2024 21:07:53 GMT

Hello,

You should review the schematics to see if the Power supply of VBUS it is correctly apply all the time, power-up sequence or sometimes the voltage it is not power up at the same time. Since the EVK it is working as expected, it would be good to check schematics to see what's different.

Best regards.